$OpenBSD: patch-configure,v 1.1 2017/05/08 21:40:10 naddy Exp $

Index: configure
--- configure.orig
+++ configure
@@ -962,7 +962,7 @@ else
 extern "C" void exit(int);
 #endif
 #include <stdio.h>
-main()
+int main()
 {
   FILE *f=fopen("conftestval", "w");
   if (!f) exit(1);
